Process of dyeing



Patented July 9,- 1929.

UNITED STATES PATENT OFFICE.

HERBERT E. GBIER, OF BROOKLYN, NEW YORK, ASSIGNOR, BY MESNE ASSIGNMENTS,

TO B. H. COMEY BROOKLYN COMPANY, INC., OF BROOKLYN, NEW YORK, A CORPORA-TION OF NEW YORK.

No Drawing.

This invention relates to a process of dyeing and has particularreference to the dyeing of articles or materials which cannot besatisfactorily treated with an aqueous dye solution. It is well-knownthat certain materials or articles when treated with an aqueous dyesolution tend to lose their shape or texture and become soft and flimsyor mushy, or undergo other detrimental changes in their physical form orstructure. The 'difliculties connected with the dyeing of such materialsis well-known and has been the subject of extensive study, and the useof alcohols, benzene and other carriers for the dyes has been triedwithout very satisfactory results. The present invention aims to providea process by which articles or materials of the kind mentioned can besuccessfully dyed without undergoing the detri- 2 mental physicalchanges above mentioned. More specifically the present invention aims toprovide a process for the. dyeing of articles or materials such asloosely woven paper cloth or articles made of loosely wwen paper, suchas paper hoods, and similar materials. It has particular reference tothe dyeing of straw or straw braids or woven hats made of straw or othervegetable fiber which tend to become soft and lose their shape, andundergo the objectionable changes above mentioned.

In carrying out my invention I first dissolve a suitable wax in asolvent which is best adapted to dissolve the particular wax selected. Amixture of waxes and a mixture of solvents may, of course, be employedif desired. The invention is not limited to the use of any particularwax or any particular solvent, but in carrying out the process a wax ofthe desired character is selected and then a solvent employed which isbest adapted to dissolve the wax. The character of the wax and solventmay be largely dependent upon the operator, his wishes and his supplies,as Well as the cost of the materials. In preparing the wax solution Ihave found either of the following to give satisfactory results:

1. Dissolve 300 grams of Japan wax in 5 liters of benzol; heat tosolution.

2. Dissolve 300 grams of Carnauba wax in 5 liters of xylene; heat tosolution.

After the wax solution is prepared, I pref- PROCESS or DYEING.

Application filed November 16, 1926. Serial No. 148,775.

for a short time, usually a few minutes, and

are then removed, and after the adhering material has dripped off thearticles are dried. In ,the case of straw or similar hats it has beenfound desirable to immerse the same in a nested condition in the dyingsolution. Such hats after being woven and while in the rough statebefore being shaped can be easily nested together, and it has been foundthat a number of such hats loosely nested together can be immersed inthe dying solution at the same time. Due to the loosely Woven characterof the hats and the loose nesting of the same the solution can penetrateto all parts of the same.

I have found that with the foregoing procedure the Wax solution alongwith the dye material penetrates to a considerable extent the fibers ofthe article which is being treated. In other words, the solventsemployed are good penetrators and as they penetrate the fibers of thematerial the wax and dye are carried into and thoroughly incorporatedwith the fibers. The result is that the fibrous articles or materialsare thoroughly dyed and also given body and will retain their shape andnot become soft and flimsy and lose their form or texture or weave orundergo other detrimental and objectionable changes.

In carrying out my process the step of applying the dye may be performedafter the articles have been subjected to the wax solution, that is, theprocess may be carried out in two se arate operations instead of asingle one, alt ough I prefer to mix the dye 1. The process of dyeingfibrous loosel woven articles which tend to become so t and to losetheir shape when wet without injuriously afl'ecting their physical formor structure, which consists in treating the articles with a solutioncontaining a wax dissolved in a solvent and a dye incorporated with thesolution.

2. The process of dyeing fibrous loosely woven articles which tend tobecome soft and to lose their shape when wet without injuriouslyafi'ecting their physical form or structure which consists in dissolvinga wax in a solvent, mixing therewith a dyeing ma terial, and immersingthe articles to be dyed in said solution.

3. The process of dyeing articles of straw which consists in immersingthe same in a solution containing wax dissolved in a solgent and a dyeincorporated with the soluion.

4:. The process of simultaneously dyeing a pluralityof woven hats ofstraw and the like which consists in dissolving a wax in a solventmixing therewith a dyeing material, immersing the hats in a looselynested condition in said solution, withdrawing and drying the same.

5. In a process of dyeing fibrous loosely woven articles which tend tobecome soft and to lose their shape when wet without injuriouslyaflecting their physical form or structure, the step which consists insubjecting the articles to a solution containing a wax dissolved in asolvent.

6. The process of dyeing fibrous loosely woven articles which tend tobecome soft and to lose their shape when wet, without injuriouslyaffecting their physical form or structure, which comprises subjectingthe articles to a dye solution and a wax solution.

7. The process of dyeing fibrous loosely woven articles which tend tobecome soft and to lose their shape when wet, without injuriouslyaliecting their physical form or structure, which consists in immersingthe same in a solution containing Japan wax dissolved in a solvent and adye incorporated with the solution.

In testimony whereof I hereunto aliix my signature.

HERBERT E. GRTER.

